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Which other event handler than click could i use?

- by Gaelle

I have a jQuery question, and I really think it is a silly one : i'm a beginner in JS and jQuery... I'm using $("#myLink").click(function(){ $(".myClassToShow").show(); $(".myClassToHide").hide(); }); to hide elements with class myClassToHide as a class attribute and show elements with class myClassToShow as a class attribute. I think this is really easy to understand :) I didn't think it would hide every elements with the good class, but, well, it works. My worry here is that my elements show and hide only for few seconds : the time my mouse click on the link. I would like to make myClassToShow elements remaining on the screen, when i already clicked my link, and myClassToHide elements really hide. For example, on the johann Hammarstrom's website, when you click on "Print", all his works which are not print gone hide, and only the printing one remain. That's kinda what i want. I searched using Firebug, but couldn't find which kind of event he used. I know a onchange is not the correct answer, so what? Could you help me please?

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How to implement a unit converter in java

- by Mohit Deshpande

How could I possibly implement a unit converter in Java??? I was thinking of having a abstract base class: public abstract class Unit { ... public void ConvertTo(Unit unit); } Then having each class like Meter Kilometer Inch Centimeter Millimeter ... derive from that base Unit class. All the units of length would be in a package called com.unitconverter.distance, then a package, com.unitconverter.energy, for energy etc. etc. So is this the best way to implement a unit converter? Or is there a better or more easier way?

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Does database affect classes?

- by satyanarayana

I had created one class User and UserDAOImpl class for querying DB using class User. As there is one table to be queried, these two classes are sufficient for me. What if there is a case where new fields are to be added to that one table is to be divided into 3 tables( user_info, user_profile and user_address) to store user? As new fields are added, I need to change classes User and UserDAOImpl, it seems these two are not sufficient. It seems database changes affect my classes. In this case, do I need to divide class User into 3 classes as tables are changes? Can any one suggest me how can I solve this without making too many changes?

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Why abstract classes necessary?

- by bala3569

1.What is the point of creating a class that can't be instantiated? Most commonly to serve as a base-class or interface (some languages have a separate interface construct, some don't) - it doesn't know the implementation (that is to be provided by the subclasses / implementing classes) 2.Why would anybody want such a class? For abstraction and re-use 3.What is the situation in which abstract classes become NECESSARY?can anyone brief it with an example?

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Updating the Jpanel of a class

- by ivor

Hi, After some advice on using jpanel - I'm new to java and playing around with the GUI elements. Bascially what I'm curious about is if I can set up a Jpanel in one class, then somehow add labels etc to the that container, but from another class. Is this possible ? or do i have to set the entire GUI up in one class, but then I guess I would have the same issue, if I wanted to update those fields I had set up in the main class from another class? Apologies I don't really have any code that's usefull to demostrate here - I'm just trying to get the idea going, working out if its possible before I go ahead. And I'm not even sure if this is possible. Any advice would be greatly appreciated. Thanks

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Operator & and * at function prototype in class

- by Puyover

I'm having a problem with a class like this: class Sprite { ... bool checkCollision(Sprite &spr); ... }; So, if I have that class, I can do this: ball.checkCollision(bar1); But if I change the class to this: class Sprite { ... bool checkCollision(Sprite* spr); ... }; I have to do this: ball.checkCollision(&bar1); So, what's the difference?? It's better a way instead other? Thank you.

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C++ inheritance: scoping and visibility of members

- by Poiuyt

Can you explain why this is not allowed, #include <stdio.h> class B { private: int a; public: int a; }; int main() { return 0; } while this is? #include <stdio.h> class A { public: int a; }; class B : public A{ private: int a; }; int main() { return 0; } In both the cases, we have one public and one private variable named a in class B. edited now!

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class function that generates its own objects

- by honeybadger

I want to write a class for some use. I want to call a function (say generate) of this class which will generate two objects of this same class. These two objects will call other function of the class. Can anyone tell me how to do this? I want it in C++ Class Example{ public: generate(); other_func(); } int main() { Example generate(); } Now this generate function should create two object of Example and will call other_func();

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STLifying C++ classes

- by shambulator

I'm trying to write a class which contains several std::vectors as data members, and provides a subset of vector's interface to access them: class Mesh { public: private: std::vector<Vector3> positions; std::vector<Vector3> normals; // Several other members along the same lines }; The main thing you can do with a mesh is add positions, normals and other stuff to it. In order to allow an STL-like way of accessing a Mesh (add from arrays, other containers, etc.), I'm toying with the idea of adding methods like this: public: template<class InIter> void AddNormals(InIter first, InIter last); Problem is, from what I understand of templates, these methods will have to be defined in the header file (seems to make sense; without a concrete iterator type, the compiler doesn't know how to generate object code for the obvious implementation of this method). Is this actually a problem? My gut reaction is not to go around sticking huge chunks of code in header files, but my C++ is a little rusty with not much STL experience outside toy examples, and I'm not sure what "acceptable" C++ coding practice is on this. Is there a better way to expose this functionality while retaining an STL-like generic programming flavour? One way would be something like this: (end list) class RestrictedVector<T> { public: RestrictedVector(std::vector<T> wrapped) : wrapped(wrapped) {} template <class InIter> void Add(InIter first, InIter last) { std::copy(first, last, std::back_insert_iterator(wrapped)); } private: std::vector<T> wrapped; }; and then expose instances of these on Mesh instead, but that's starting to reek a little of overengineering :P Any advice is greatly appreciated!

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Complex class using PHP soapserver mapclass

- by user559343

Hi all, I need to create a server for processing SOAP requests. I have the wsdl and xml specifications, but I have a doubt: the xml elements are pretty complex, they are not simple type, but they have parent/child relationships (e.g. I have a Book class with an author subclass). How can I map this to PHP classes? In this example, should I create an author class i.e.: class Author { public $name; public $surname; } and then class Book { public $author; } will $author be a class of type Author? Or a typed array? Any help will be appreciated Thanks and happy new year!

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About a Class Object

- by Chicko Bueno

I have a very basic question about a class object. After the class has been created, we need to create a class object. At this point, I'm a bit confused to make either *object or object. Example: CClass object CClass *object What is the difference both of them? And to access class function i need to use dot '.' and arrow '->'. I know dot and arrow used to access class function, but what is the significant meaning for both dot and arrow?

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Class.getArrayType in Java?

- by ???

I use the following trick to get the array type of a specific class: @SuppressWarnings("unchecked") public static <T> Class<T[]> getArrayType(Class<T> componentType) { String arrayClassName = "[L" + componentType.getName() + ";"; try { return (Class<T[]>) Class.forName(arrayClassName); } catch (ClassNotFoundException e) { throw new UnexpectedException("Can't get the array type for " + componentType, e); } } But, is there any more elegant way to get this?

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An issue on object orientation in php

- by rabidmachine9

Hello people, I have come up to issues while I'm trying to write some classes, here is an example: I have this class called TwitterGrub and I cant call it like that: $c = new TwitterGrub(); $c->twitterDisplay(); here is the class itself: <?php class TwitterGrub{ function twitterCapture($user = 'username',$password = 'pass') { $ch = curl_init("https://twitter.com/statuses/user_timeline.xml"); curl_setopt($ch, CURLOPT_HEADER, 1); curl_setopt($ch,CURLOPT_TIMEOUT, 30); curl_setopt($ch,CURLOPT_USERPWD,$user . ":" . $password); curl_setopt($ch,CURLOPT_RETURNTRANSFER,1); curl_setopt ($ch, CURLOPT_SSL_VERIFYPEER, 0); curl_setopt ($ch, CURLOPT_SSL_VERIFYHOST, 0); $result=curl_exec ($ch); $data = strstr($result, '<?'); $xml = new SimpleXMLElement($data); return $xml; } function twitterDisplay($twitNum = 2){ $xml = $this::twitterCapture(); for($i= 0; $i<$twitNum; $i++){ echo "<div class= 'curvebox'>".$xml->status[$i]->text."</div>"; } } } ?> The problem is that everytime I want to change the username or password I have to jump back to class definition and that makes things not modular... and in many ways it feels wrong. So the question is what would be the proper way to chance my username and password through the objects interface and then call twitterDisplay() method with the new data?Hope that makes sense. Thanks in advance

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Make object by it's name

- by Ockonal

Hello, is it possible to return exemplar of object using passed type name (string) in c++? I have some base abstract class Base and a few derivates. Example code: class Base { /* ... */ }; class Der1 : public Base { /* ... */ }; class Der2 : public Base { /* ... */ }; And I need function like: Base *objectByType(const std::string &name); Number of derivates classes are changeable and I don't want to make something like switching of name and returning by hands new object type. Is it possible in c++ to do that automatically anyway? p.s. usage should looks like: dynamic_cast<Der1>(objectByType("Der1")); I need pure c++ code (crossplatform). Using boost is permissible.

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Passing class method as selector problem.

- by Anoide

Hi, I want to build a selector from a class method. I'm doing it this way: NavigationTreeActionHandler* handler=[NavigationTreeActionHandler self]; NavigationTreeNode* bombsNode=new NavigationTreeNode("Bombs","bigbomb.tif" ,handler,@selector(BigBombButtonPressed:)); I need to pass to NavigationTreeNode the target and the selector to the target method. I try to get the target using the self property of the class object (Don't know if htis is the correct way to do it). Then I get the selector for the class method I want to call on the class. Everything compiles ok but it fails when I use: [[handler class] instanceMethodSignatureForSelector:selector]; I get a nil and don't really know why... could anybody help please? Thanks in advance, Olson.

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Correct approach to validate attributes of an instance of class

- by systempuntoout

Having a simple Python class like this: class Spam(object): __init__(self, description, value): self.description = description self.value = value Which is the correct approach to check these constraints: "description cannot be empty" "value must be greater than zero" Should i: 1.validate data before creating spam object ? 2.check data on __init__ method ? 3.create an is_valid method on Spam class and call it with spam.isValid() ? 4.create an is_valid static method on Spam class and call it with Spam.isValid(description, value) ? 5.check data on setters declaration ? 6.... Could you recommend a well designed\Pythonic\not verbose (on class with many attributes)\elegant approach?

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C# Strange Behavior

- by Betamoo

I have a custom struct : struct A { public int y; } a custom class with empty constuctor: class B { public A a; public B() { } } and here is the main: static void Main(string[] args) { B b = new B(); b.a.y = 5;//No runtime errors! Console.WriteLine(b.a.y); } When I run the above program, it does not give me any errors, although I did not initialize struct A in class B constructor..'a=new A();'

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EF4 (CPT5) ForeignKeyAttribute in base class - Assert Failure entityType != null

- by Anthony Johnston

Getting an error when trying to set a ForeignKeyAttribute in a base class class User{} abstract class FruitBase{ [ForeignKey("CreateById")] public User CreateBy{ get; set; } public int CreateById{ get; set; } } class Banana{} class DataContext : DbContext{ DbSet<Banana> Bananas{ get; set; } } If I move the FruitBase code into the banana, all is well, but I don't want to, as there will be many many fruit and I want to remain relatively DRY if I can Is this a know issue that will be fixed by March? Does anyone know a work around?

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How can I call a method given only its name?

- by mfolnovich

I'm trying to have method void run( string method ) which would run method in that class. For example: class Foo { public: void run( string method ) { // this method calls method *method* from this class } void bar() { printf( "Function bar\n" ); } void foo2() { printf( "Function foo2\n" ); } } Foo foo; int main( void ) { foo.run( "bar" ); foo.run( "foo2" ); } this would print: Function bar Function foo2 Thanks! :)

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How to implement callback functions inside classes (PHP)

- by sombe

I need to use a class callback method on an array inside another method (the callback function belongs to the class). class Database { public function escape_string_for_db($string){ return mysql_real_escape_string($string); } public function escape_all_array($array){ return array_filter($array,"$this->escape_string_for_db"); } } Is this the right way to go about that? (I mean, in terms of the second parameter passed to array_filter)

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C++ inheritance doubt

- by Poiuyt

Can you explain why this is not allowed, #include <stdio.h> class B { private: int a; public: int a; }; int main() { return 0; } while this is? #include <stdio.h> class A { public: int a; }; class B : public A{ private: int a; }; int main() { return 0; } In both the cases, we have one public and one private variable named a in class B.

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Which class will be instanciated

- by Michael

Say I have 2 subclasses from UIViewController, class A and class B. In Main nib file an object is representing class A and it is set to load file from Secondary nib file. The owner of Secondary nib is of class B. The question is - from which class an object in Main nib file will be instanciated once the nib files unarchived in the memory? The reason this question arised is that I have to take care myself if such reference to external NIB file present, to ensure that the first nib's object and second nib's owner is same. Please correct me if my statement is wrong.

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Abstract class and operator!= in c++

- by Alessandro Teruzzi

Hi All, I have problem implementing the operator!= in a set class deriving from an abstact one. The code looks like this: class Abstract { public: //to make the syntax easier let's use a raw pointer virtual bool operator!=(const Abstract* other) = 0; }; class Implementation { SomeObject impl_; //that already implement the operator!= public: bool operator!=(const Abstract* other) { return dynamic_cast<Implementation*>(other)->impl_ != this->impl_; } }; This code works but it has the drawback to use dynamic_cast and I need to handle error in casting operation. This is a generic problem that occur when a function of a concrete class it is trying to using some internal information (not available at the abstract class level) to perform a task. Is there any better way to solve this kind of problem? Cheers

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ASP.NET Podcast Show #148 - ASP.NET WebForms to build a Mobile Web Application

- by Wallym

Check the podcast site for the original url. This is the video and source code for an ASP.NET WebForms app that I wrote that is optimized for the iPhone and mobile environments. Subscribe to everything. Subscribe to WMV. Subscribe to M4V for iPhone/iPad. Subscribe to MP3. Download WMV. Download M4V for iPhone/iPad. Download MP3. Link to iWebKit. Source Code: <%@ Page Title="MapSplore" Language="C#" MasterPageFile="iPhoneMaster.master" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="AT_iPhone_Default" %> <asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server"></asp:Content><asp:Content ID="Content2" ContentPlaceHolderID="Content" Runat="Server" ClientIDMode="Static"> <asp:ScriptManager ID="sm" runat="server" EnablePartialRendering="true" EnableHistory="false" EnableCdn="true" /> <script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=true"></script> <script language="javascript" type="text/javascript">  </script> <asp:HiddenField ID="Latitude" runat="server" /> <asp:HiddenField ID="Longitude" runat="server" /> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js%22%3E%3C/script> <script language="javascript" type="text/javascript"> $(document).ready(function () { GetLocation(); setupMapDiv(); setupPlaceIveBeen(); }); function GetLocation() { if (navigator.geolocation != null) { navigator.geolocation.getCurrentPosition(getData); } else { var mess = document.getElementById('<%=Message.ClientID %>'); mess.innerHTML = "Sorry, your browser does not support geolocation. " + "Try the latest version of Safari on the iPhone, Android browser, or the latest version of FireFox."; } } function UpdateLocation_Click() { GetLocation(); } function getData(position) { var latitude = position.coords.latitude; var longitude = position.coords.longitude; var hdLat = document.getElementById('<%=Latitude.ClientID %>'); var hdLon = document.getElementById('<%=Longitude.ClientID %>'); hdLat.value = latitude; hdLon.value = longitude; } </script> <asp:Label ID="Message" runat="server" /> <asp:UpdatePanel ID="upl" runat="server"> <ContentTemplate> <asp:Panel ID="pnlStart" runat="server" Visible="true"> <div id="topbar"> <div id="title">MapSplore</div> </div> <div id="content"> <ul class="pageitem"> <li class="menu"> <asp:LinkButton ID="lbLocalDeals" runat="server" onclick="lbLocalDeals_Click"> <asp:Image ID="imLocalDeals" runat="server" ImageUrl="~/Images/ArtFavor_Money_Bag_Icon.png" Height="30" /> <span class="name">Local Deals.</span> <span class="arrow"></span> </asp:LinkButton> </li> <li class="menu"> <asp:LinkButton ID="lbLocalPlaces" runat="server" onclick="lbLocalPlaces_Click"> <asp:Image ID="imLocalPlaces" runat="server" ImageUrl="~/Images/Andy_Houses_on_the_horizon_-_Starburst_remix.png" Height="30" /> <span class="name">Local Places.</span> <span class="arrow"></span> </asp:LinkButton> </li> <li class="menu"> <asp:LinkButton ID="lbWhereIveBeen" runat="server" onclick="lbWhereIveBeen_Click"> <asp:Image ID="imImHere" runat="server" ImageUrl="~/Images/ryanlerch_flagpole.png" Height="30" /> <span class="name">I've been here.</span> <span class="arrow"></span> </asp:LinkButton> </li> <li class="menu"> <asp:LinkButton ID="lbMyStats" runat="server"> <asp:Image ID="imMyStats" runat="server" ImageUrl="~/Images/Anonymous_Spreadsheet.png" Height="30" /> <span class="name">My Stats.</span> <span class="arrow"></span> </asp:LinkButton> </li> <li class="menu"> <asp:LinkButton ID="lbAddAPlace" runat="server" onclick="lbAddAPlace_Click"> <asp:Image ID="imAddAPlace" runat="server" ImageUrl="~/Images/jean_victor_balin_add.png" Height="30" /> <span class="name">Add a Place.</span> <span class="arrow"></span> </asp:LinkButton> </li> <li class="button"> <input type="button" value="Update Your Current Location" onclick="UpdateLocation_Click()"> </li> </ul> </div> </asp:Panel> <div> <asp:Panel ID="pnlCoupons" runat="server" Visible="false"> <div id="topbar"> <div id="title">MapSplore</div> <div id="leftbutton"> <asp:LinkButton runat="server" Text="Return" ID="ReturnFromDeals" OnClick="ReturnFromDeals_Click" /></div></div> <div class="content"> <asp:ListView ID="lvCoupons" runat="server"> <LayoutTemplate> <ul class="pageitem" runat="server"> <asp:PlaceHolder ID="itemPlaceholder" runat="server" /> </ul> </LayoutTemplate> <ItemTemplate> <li class="menu"> <asp:LinkButton ID="lbBusiness" runat="server" Text='<%#Eval("Place.Name") %>' OnClick="lbBusiness_Click"> <span class="comment"> <asp:Label ID="lblAddress" runat="server" Text='<%#Eval("Place.Address1") %>' /> <asp:Label ID="lblDis" runat="server" Text='<%# Convert.ToString(Convert.ToInt32(Eval("Place.Distance"))) + " meters" %>' CssClass="smallText" /> <asp:HiddenField ID="hdPlaceId" runat="server" Value='<%#Eval("PlaceId") %>' /> <asp:HiddenField ID="hdGeoPromotionId" runat="server" Value='<%#Eval("GeoPromotionId") %>' /> </span> <span class="arrow"></span> </asp:LinkButton></li></ItemTemplate></asp:ListView><asp:GridView ID="gvCoupons" runat="server" AutoGenerateColumns="false"> <HeaderStyle BackColor="Silver" /> <AlternatingRowStyle BackColor="Wheat" /> <Columns> <asp:TemplateField AccessibleHeaderText="Business" HeaderText="Business"> <ItemTemplate> <asp:Image ID="imPlaceType" runat="server" Text='<%#Eval("Type") %>' ImageUrl='<%#Eval("Image") %>' /> <asp:LinkButton ID="lbBusiness" runat="server" Text='<%#Eval("Name") %>' OnClick="lbBusiness_Click" /> <asp:LinkButton ID="lblAddress" runat="server" Text='<%#Eval("Address1") %>' CssClass="smallText" /> <asp:Label ID="lblDis" runat="server" Text='<%# Convert.ToString(Convert.ToInt32(Eval("Distance"))) + " meters" %>' CssClass="smallText" /> <asp:HiddenField ID="hdPlaceId" runat="server" Value='<%#Eval("PlaceId") %>' /> <asp:HiddenField ID="hdGeoPromotionId" runat="server" Value='<%#Eval("GeoPromotionId") %>' /> <asp:Label ID="lblInfo" runat="server" Visible="false" /> </ItemTemplate> </asp:TemplateField> </Columns> </asp:GridView> </div> </asp:Panel> <asp:Panel ID="pnlPlaces" runat="server" Visible="false"> <div id="topbar"> <div id="title"> MapSplore</div><div id="leftbutton"> <asp:LinkButton runat="server" Text="Return" ID="ReturnFromPlaces" OnClick="ReturnFromPlaces_Click" /></div></div> <div id="content"> <asp:ListView ID="lvPlaces" runat="server"> <LayoutTemplate> <ul id="ulPlaces" class="pageitem" runat="server"> <asp:PlaceHolder ID="itemPlaceholder" runat="server" /> <li class="menu"> <asp:LinkButton ID="lbNotListed" runat="server" CssClass="name" OnClick="lbNotListed_Click"> Place not listed <span class="arrow"></span> </asp:LinkButton> </li> </ul> </LayoutTemplate> <ItemTemplate> <li class="menu"> <asp:LinkButton ID="lbImHere" runat="server" CssClass="name" OnClick="lbImHere_Click"> <%#DisplayName(Eval("Name")) %>  <%# Convert.ToString(Convert.ToInt32(Eval("Distance"))) + " meters" %> <asp:HiddenField ID="hdPlaceId" runat="server" Value='<%#Eval("PlaceId") %>' /> <span class="arrow"></span> </asp:LinkButton></li></ItemTemplate></asp:ListView> </div> </asp:Panel> <asp:Panel ID="pnlImHereNow" runat="server" Visible="false"> <div id="topbar"> <div id="title"> MapSplore</div><div id="leftbutton"> <asp:LinkButton runat="server" Text="Places" ID="lbImHereNowReturn" OnClick="lbImHereNowReturn_Click" /></div></div> <div id="rightbutton"> <asp:LinkButton runat="server" Text="Beginning" ID="lbBackToBeginning" OnClick="lbBackToBeginning_Click" /> </div> <div id="content"> <ul class="pageitem"> <asp:HiddenField ID="hdPlaceId" runat="server" /> <asp:HiddenField ID="hdPlaceLat" runat="server" /> <asp:HiddenField ID="hdPlaceLon" runat="server" /> <asp:HiddenField ID="hdPlaceTitle" runat="server" /> <asp:Button ID="btnImHereNow" runat="server" Text="I'm here" OnClick="btnImHereNow_Click" /> <asp:Label ID="lblPlaceTitle" runat="server" /><br /> <asp:TextBox ID="txtWhatsHappening" runat="server" TextMode="MultiLine" Rows="2" style="width:300px" /><br /> <div id="divImHere" style="width:300px; height:300px"></div> </div> </ul> </asp:Panel> <asp:Panel runat="server" ID="pnlIveBeenHere" Visible="false"> <div id="topbar"> <div id="title"> Where I've been</div><div id="leftbutton"> <asp:LinkButton ID="lbIveBeenHereBack" runat="server" Text="Back" OnClick="lbIveBeenHereBack_Click" /></div></div> <div id="content"> <asp:ListView ID="lvWhereIveBeen" runat="server"> <LayoutTemplate> <ul id="ulWhereIveBeen" class="pageitem" runat="server"> <asp:PlaceHolder ID="itemPlaceholder" runat="server" /> </ul> </LayoutTemplate> <ItemTemplate> <li class="menu" runat="server"> <asp:LinkButton ID="lbPlaceIveBeen" runat="server" OnClick="lbPlaceIveBeen_Click" CssClass="name"> <asp:Label ID="lblPlace" runat="server" Text='<%#Eval("PlaceName") %>' /> at <asp:Label ID="lblTime" runat="server" Text='<%#Eval("ATTime") %>' CssClass="content" /> <asp:HiddenField ID="hdATID" runat="server" Value='<%#Eval("ATID") %>' /> <span class="arrow"></span> </asp:LinkButton> </li> </ItemTemplate> </asp:ListView> </div> </asp:Panel> <asp:Panel runat="server" ID="pnlPlaceIveBeen" Visible="false"> <div id="topbar"> <div id="title"> I've been here </div> <div id="leftbutton"> <asp:LinkButton ID="lbPlaceIveBeenBack" runat="server" Text="Back" OnClick="lbPlaceIveBeenBack_Click" /> </div> <div id="rightbutton"> <asp:LinkButton ID="lbPlaceIveBeenBeginning" runat="server" Text="Beginning" OnClick="lbPlaceIveBeenBeginning_Click" /> </div> </div> <div id="content"> <ul class="pageitem"> <li> <asp:HiddenField ID="hdPlaceIveBeenPlaceId" runat="server" /> <asp:HiddenField ID="hdPlaceIveBeenLatitude" runat="server" /> <asp:HiddenField ID="hdPlaceIveBeenLongitude" runat="server" /> <asp:Label ID="lblPlaceIveBeenName" runat="server" /><br /> <asp:Label ID="lblPlaceIveBeenAddress" runat="server" /><br /> <asp:Label ID="lblPlaceIveBeenCity" runat="server" />, <asp:Label ID="lblPlaceIveBeenState" runat="server" /> <asp:Label ID="lblPlaceIveBeenZipCode" runat="server" /><br /> <asp:Label ID="lblPlaceIveBeenCountry" runat="server" /><br /> <div id="divPlaceIveBeen" style="width:300px; height:300px"></div> </li> </ul> </div> </asp:Panel> <asp:Panel ID="pnlAddPlace" runat="server" Visible="false"> <div id="topbar"><div id="title">MapSplore</div><div id="leftbutton"><asp:LinkButton ID="lbAddPlaceReturn" runat="server" Text="Back" OnClick="lbAddPlaceReturn_Click" /></div><div id="rightnav"></div></div><div id="content"> <ul class="pageitem"> <li id="liPlaceAddMessage" runat="server" visible="false"> <asp:Label ID="PlaceAddMessage" runat="server" /> </li> <li class="bigfield"> <asp:TextBox ID="txtPlaceName" runat="server" placeholder="Name of Establishment" /> </li> <li class="bigfield"> <asp:TextBox ID="txtAddress1" runat="server" placeholder="Address 1" /> </li> <li class="bigfield"> <asp:TextBox ID="txtCity" runat="server" placeholder="City" /> </li> <li class="select"> <asp:DropDownList ID="ddlProvince" runat="server" placeholder="Select State" /> <span class="arrow"></span> </li> <li class="bigfield"> <asp:TextBox ID="txtZipCode" runat="server" placeholder="Zip Code" /> </li> <li class="select"> <asp:DropDownList ID="ddlCountry" runat="server" onselectedindexchanged="ddlCountry_SelectedIndexChanged" /> <span class="arrow"></span> </li> <li class="bigfield"> <asp:TextBox ID="txtPhoneNumber" runat="server" placeholder="Phone Number" /> </li> <li class="checkbox"> <span class="name">You Here Now:</span> <asp:CheckBox ID="cbYouHereNow" runat="server" Checked="true" /> </li> <li class="button"> <asp:Button ID="btnAdd" runat="server" Text="Add Place" onclick="btnAdd_Click" /> </li> </ul></div> </asp:Panel> <asp:Panel ID="pnlImHere" runat="server" Visible="false"> <asp:TextBox ID="txtImHere" runat="server" TextMode="MultiLine" Rows="3" Columns="40" /><br /> <asp:DropDownList ID="ddlPlace" runat="server" /><br /> <asp:Button ID="btnHere" runat="server" Text="Tell Everyone I'm Here" onclick="btnHere_Click" /><br /> </asp:Panel> </div> </ContentTemplate> </asp:UpdatePanel> </asp:Content> Code Behind .cs file: using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.HtmlControls;using System.Web.UI.WebControls;using LocationDataModel; public partial class AT_iPhone_Default : ViewStatePage{ private iPhoneDevice ipd; protected void Page_Load(object sender, EventArgs e) { LocationDataEntities lde = new LocationDataEntities(); if (!Page.IsPostBack) { var Countries = from c in lde.Countries select c; foreach (Country co in Countries) { ddlCountry.Items.Add(new ListItem(co.Name, co.CountryId.ToString())); } ddlCountry_SelectedIndexChanged(ddlCountry, null); if (AppleIPhone.IsIPad()) ipd = iPhoneDevice.iPad; if (AppleIPhone.IsIPhone()) ipd = iPhoneDevice.iPhone; if (AppleIPhone.IsIPodTouch()) ipd = iPhoneDevice.iPodTouch; } } protected void btnPlaces_Click(object sender, EventArgs e) { } protected void btnAdd_Click(object sender, EventArgs e) { bool blImHere = cbYouHereNow.Checked; string Place = txtPlaceName.Text, Address1 = txtAddress1.Text, City = txtCity.Text, ZipCode = txtZipCode.Text, PhoneNumber = txtPhoneNumber.Text, ProvinceId = ddlProvince.SelectedItem.Value, CountryId = ddlCountry.SelectedItem.Value; int iProvinceId, iCountryId; double dLatitude, dLongitude; DataAccess da = new DataAccess(); if ((!String.IsNullOrEmpty(ProvinceId)) && (!String.IsNullOrEmpty(CountryId))) { iProvinceId = Convert.ToInt32(ProvinceId); iCountryId = Convert.ToInt32(CountryId); if (blImHere) { dLatitude = Convert.ToDouble(Latitude.Value); dLongitude = Convert.ToDouble(Longitude.Value); da.StorePlace(Place, Address1, String.Empty, City, iProvinceId, ZipCode, iCountryId, PhoneNumber, dLatitude, dLongitude); } else { da.StorePlace(Place, Address1, String.Empty, City, iProvinceId, ZipCode, iCountryId, PhoneNumber); } liPlaceAddMessage.Visible = true; PlaceAddMessage.Text = "Awesome, your place has been added. Add Another!"; txtPlaceName.Text = String.Empty; txtAddress1.Text = String.Empty; txtCity.Text = String.Empty; ddlProvince.SelectedIndex = -1; txtZipCode.Text = String.Empty; txtPhoneNumber.Text = String.Empty; } else { liPlaceAddMessage.Visible = true; PlaceAddMessage.Text = "Please select a State and a Country."; } } protected void ddlCountry_SelectedIndexChanged(object sender, EventArgs e) { string CountryId = ddlCountry.SelectedItem.Value; if (!String.IsNullOrEmpty(CountryId)) { int iCountryId = Convert.ToInt32(CountryId); LocationDataModel.LocationDataEntities lde = new LocationDataModel.LocationDataEntities(); var prov = from p in lde.Provinces where p.CountryId == iCountryId orderby p.ProvinceName select p; ddlProvince.Items.Add(String.Empty); foreach (Province pr in prov) { ddlProvince.Items.Add(new ListItem(pr.ProvinceName, pr.ProvinceId.ToString())); } } else { ddlProvince.Items.Clear(); } } protected void btnImHere_Click(object sender, EventArgs e) { int i = 0; DataAccess da = new DataAccess(); double Lat = Convert.ToDouble(Latitude.Value), Lon = Convert.ToDouble(Longitude.Value); List<Place> lp = da.NearByLocations(Lat, Lon); foreach (Place p in lp) { ListItem li = new ListItem(p.Name, p.PlaceId.ToString()); if (i == 0) { li.Selected = true; } ddlPlace.Items.Add(li); i++; } pnlAddPlace.Visible = false; pnlImHere.Visible = true; } protected void lbImHere_Click(object sender, EventArgs e) { string UserName = Membership.GetUser().UserName; ListViewItem lvi = (ListViewItem)(((LinkButton)sender).Parent); HiddenField hd = (HiddenField)lvi.FindControl("hdPlaceId"); long PlaceId = Convert.ToInt64(hd.Value); double dLatitude = Convert.ToDouble(Latitude.Value); double dLongitude = Convert.ToDouble(Longitude.Value); DataAccess da = new DataAccess(); Place pl = da.GetPlace(PlaceId); pnlImHereNow.Visible = true; pnlPlaces.Visible = false; hdPlaceId.Value = PlaceId.ToString(); hdPlaceLat.Value = pl.Latitude.ToString(); hdPlaceLon.Value = pl.Longitude.ToString(); hdPlaceTitle.Value = pl.Name; lblPlaceTitle.Text = pl.Name; } protected void btnHere_Click(object sender, EventArgs e) { string UserName = Membership.GetUser().UserName; string WhatsH = txtImHere.Text; long PlaceId = Convert.ToInt64(ddlPlace.SelectedValue); double dLatitude = Convert.ToDouble(Latitude.Value); double dLongitude = Convert.ToDouble(Longitude.Value); DataAccess da = new DataAccess(); da.StoreUserAT(UserName, PlaceId, WhatsH, dLatitude, dLongitude); } protected void btnLocalCoupons_Click(object sender, EventArgs e) { double dLatitude = Convert.ToDouble(Latitude.Value); double dLongitude = Convert.ToDouble(Longitude.Value); DataAccess da = new DataAccess(); } protected void lbBusiness_Click(object sender, EventArgs e) { string UserName = Membership.GetUser().UserName; GridViewRow gvr = (GridViewRow)(((LinkButton)sender).Parent.Parent); HiddenField hd = (HiddenField)gvr.FindControl("hdPlaceId"); string sPlaceId = hd.Value; Int64 PlaceId; if (!String.IsNullOrEmpty(sPlaceId)) { PlaceId = Convert.ToInt64(sPlaceId); } } protected void lbLocalDeals_Click(object sender, EventArgs e) { double dLatitude = Convert.ToDouble(Latitude.Value); double dLongitude = Convert.ToDouble(Longitude.Value); DataAccess da = new DataAccess(); pnlCoupons.Visible = true; pnlStart.Visible = false; List<GeoPromotion> lgp = da.NearByDeals(dLatitude, dLongitude); lvCoupons.DataSource = lgp; lvCoupons.DataBind(); } protected void lbLocalPlaces_Click(object sender, EventArgs e) { DataAccess da = new DataAccess(); double Lat = Convert.ToDouble(Latitude.Value); double Lon = Convert.ToDouble(Longitude.Value); List<LocationDataModel.Place> places = da.NearByLocations(Lat, Lon); lvPlaces.DataSource = places; lvPlaces.SelectedIndex = -1; lvPlaces.DataBind(); pnlPlaces.Visible = true; pnlStart.Visible = false; } protected void ReturnFromPlaces_Click(object sender, EventArgs e) { pnlPlaces.Visible = false; pnlStart.Visible = true; } protected void ReturnFromDeals_Click(object sender, EventArgs e) { pnlCoupons.Visible = false; pnlStart.Visible = true; } protected void btnImHereNow_Click(object sender, EventArgs e) { long PlaceId = Convert.ToInt32(hdPlaceId.Value); string UserName = Membership.GetUser().UserName; string WhatsHappening = txtWhatsHappening.Text; double UserLat = Convert.ToDouble(Latitude.Value); double UserLon = Convert.ToDouble(Longitude.Value); DataAccess da = new DataAccess(); da.StoreUserAT(UserName, PlaceId, WhatsHappening, UserLat, UserLon); } protected void lbImHereNowReturn_Click(object sender, EventArgs e) { pnlImHereNow.Visible = false; pnlPlaces.Visible = true; } protected void lbBackToBeginning_Click(object sender, EventArgs e) { pnlStart.Visible = true; pnlImHereNow.Visible = false; } protected void lbWhereIveBeen_Click(object sender, EventArgs e) { string UserName = Membership.GetUser().UserName; pnlStart.Visible = false; pnlIveBeenHere.Visible = true; DataAccess da = new DataAccess(); lvWhereIveBeen.DataSource = da.UserATs(UserName, 0, 15); lvWhereIveBeen.DataBind(); } protected void lbIveBeenHereBack_Click(object sender, EventArgs e) { pnlIveBeenHere.Visible = false; pnlStart.Visible = true; } protected void lbPlaceIveBeen_Click(object sender, EventArgs e) { LinkButton lb = (LinkButton)sender; ListViewItem lvi = (ListViewItem)lb.Parent.Parent; HiddenField hdATID = (HiddenField)lvi.FindControl("hdATID"); Int64 ATID = Convert.ToInt64(hdATID.Value); DataAccess da = new DataAccess(); pnlIveBeenHere.Visible = false; pnlPlaceIveBeen.Visible = true; var plac = da.GetPlaceViaATID(ATID); hdPlaceIveBeenPlaceId.Value = plac.PlaceId.ToString(); hdPlaceIveBeenLatitude.Value = plac.Latitude.ToString(); hdPlaceIveBeenLongitude.Value = plac.Longitude.ToString(); lblPlaceIveBeenName.Text = plac.Name; lblPlaceIveBeenAddress.Text = plac.Address1; lblPlaceIveBeenCity.Text = plac.City; lblPlaceIveBeenState.Text = plac.Province.ProvinceName; lblPlaceIveBeenZipCode.Text = plac.ZipCode; lblPlaceIveBeenCountry.Text = plac.Country.Name; } protected void lbNotListed_Click(object sender, EventArgs e) { SetupAddPoint(); pnlPlaces.Visible = false; } protected void lbAddAPlace_Click(object sender, EventArgs e) { SetupAddPoint(); } private void SetupAddPoint() { double lat = Convert.ToDouble(Latitude.Value); double lon = Convert.ToDouble(Longitude.Value); DataAccess da = new DataAccess(); var zip = da.WhereAmIAt(lat, lon); if (zip.Count > 0) { var z0 = zip[0]; txtCity.Text = z0.City; txtZipCode.Text = z0.ZipCode; ddlProvince.ClearSelection(); if (z0.ProvinceId.HasValue == true) { foreach (ListItem li in ddlProvince.Items) { if (li.Value == z0.ProvinceId.Value.ToString()) { li.Selected = true; break; } } } } pnlAddPlace.Visible = true; pnlStart.Visible = false; } protected void lbAddPlaceReturn_Click(object sender, EventArgs e) { pnlAddPlace.Visible = false; pnlStart.Visible = true; liPlaceAddMessage.Visible = false; PlaceAddMessage.Text = String.Empty; } protected void lbPlaceIveBeenBack_Click(object sender, EventArgs e) { pnlIveBeenHere.Visible = true; pnlPlaceIveBeen.Visible = false; } protected void lbPlaceIveBeenBeginning_Click(object sender, EventArgs e) { pnlPlaceIveBeen.Visible = false; pnlStart.Visible = true; } protected string DisplayName(object val) { string strVal = Convert.ToString(val); if (AppleIPhone.IsIPad()) { ipd = iPhoneDevice.iPad; } if (AppleIPhone.IsIPhone()) { ipd = iPhoneDevice.iPhone; } if (AppleIPhone.IsIPodTouch()) { ipd = iPhoneDevice.iPodTouch; } return (iPhoneHelper.DisplayContentOnMenu(strVal, ipd)); }} iPhoneHelper.cs file: using System;using System.Collections.Generic;using System.Linq;using System.Web; public enum iPhoneDevice{ iPhone, iPodTouch, iPad}/// <summary>/// Summary description for iPhoneHelper/// </summary>/// public class iPhoneHelper{ public iPhoneHelper() { // // TODO: Add constructor logic here // } // This code is stupid in retrospect. Use css to solve this problem public static string DisplayContentOnMenu(string val, iPhoneDevice ipd) { string Return = val; string Elipsis = "..."; int iPadMaxLength = 30; int iPhoneMaxLength = 15; if (ipd == iPhoneDevice.iPad) { if (Return.Length > iPadMaxLength) { Return = Return.Substring(0, iPadMaxLength - Elipsis.Length) + Elipsis; } } else { if (Return.Length > iPhoneMaxLength) { Return = Return.Substring(0, iPhoneMaxLength - Elipsis.Length) + Elipsis; } } return (Return); }} Source code for the ViewStatePage: using System;using System.Data;using System.Data.SqlClient;using System.Configuration;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls; /// <summary>/// Summary description for BasePage/// </summary>#region Base class for a page.public class ViewStatePage : System.Web.UI.Page{ PageStatePersisterToDatabase myPageStatePersister; public ViewStatePage() : base() { myPageStatePersister = new PageStatePersisterToDatabase(this); } protected override PageStatePersister PageStatePersister { get { return myPageStatePersister; } } }#endregion #region This class will override the page persistence to store page state in a database.public class PageStatePersisterToDatabase : PageStatePersister{ private string ViewStateKeyField = "__VIEWSTATE_KEY"; private string _exNoConnectionStringFound = "No Database Configuration information is in the web.config."; public PageStatePersisterToDatabase(Page page) : base(page) { } public override void Load() { // Get the cache key from the web form data System.Int64 key = Convert.ToInt64(Page.Request.Params[ViewStateKeyField]); Pair state = this.LoadState(key); // Abort if cache object is not of type Pair if (state == null) throw new ApplicationException("Missing valid " + ViewStateKeyField); // Set view state and control state ViewState = state.First; ControlState = state.Second; } public override void Save() { // No processing needed if no states available if (ViewState == null && ControlState != null) return; System.Int64 key; IStateFormatter formatter = this.StateFormatter; Pair statePair = new Pair(ViewState, ControlState); // Serialize the statePair object to a string. string serializedState = formatter.Serialize(statePair); // Save the ViewState and get a unique identifier back. key = SaveState(serializedState); // Register hidden field to store cache key in // Page.ClientScript does not work properly with Atlas. //Page.ClientScript.RegisterHiddenField(ViewStateKeyField, key.ToString()); ScriptManager.RegisterHiddenField(this.Page, ViewStateKeyField, key.ToString()); } private System.Int64 SaveState(string PageState) { System.Int64 i64Key = 0; string strConn = String.Empty, strProvider = String.Empty; string strSql = "insert into tblPageState ( SerializedState ) values ( '" + SqlEscape(PageState) + "');select scope_identity();"; SqlConnection sqlCn; SqlCommand sqlCm; try { GetDBConnectionString(ref strConn, ref strProvider); sqlCn = new SqlConnection(strConn); sqlCm = new SqlCommand(strSql, sqlCn); sqlCn.Open(); i64Key = Convert.ToInt64(sqlCm.ExecuteScalar()); if (sqlCn.State != ConnectionState.Closed) { sqlCn.Close(); } sqlCn.Dispose(); sqlCm.Dispose(); } finally { sqlCn = null; sqlCm = null; } return i64Key; } private Pair LoadState(System.Int64 iKey) { string strConn = String.Empty, strProvider = String.Empty, SerializedState = String.Empty, strMinutesInPast = GetMinutesInPastToDelete(); Pair PageState; string strSql = "select SerializedState from tblPageState where tblPageStateID=" + iKey.ToString() + ";" + "delete from tblPageState where DateUpdated<DateAdd(mi, " + strMinutesInPast + ", getdate());"; SqlConnection sqlCn; SqlCommand sqlCm; try { GetDBConnectionString(ref strConn, ref strProvider); sqlCn = new SqlConnection(strConn); sqlCm = new SqlCommand(strSql, sqlCn); sqlCn.Open(); SerializedState = Convert.ToString(sqlCm.ExecuteScalar()); IStateFormatter formatter = this.StateFormatter; if ((null == SerializedState) || (String.Empty == SerializedState)) { throw (new ApplicationException("No ViewState records were returned.")); } // Deserilize returns the Pair object that is serialized in // the Save method. PageState = (Pair)formatter.Deserialize(SerializedState); if (sqlCn.State != ConnectionState.Closed) { sqlCn.Close(); } sqlCn.Dispose(); sqlCm.Dispose(); } finally { sqlCn = null; sqlCm = null; } return PageState; } private string SqlEscape(string Val) { string ReturnVal = String.Empty; if (null != Val) { ReturnVal = Val.Replace("'", "''"); } return (ReturnVal); } private void GetDBConnectionString(ref string ConnectionStringValue, ref string ProviderNameValue) { if (System.Configuration.ConfigurationManager.ConnectionStrings.Count > 0) { ConnectionStringValue = System.Configuration.ConfigurationManager.ConnectionStrings["ApplicationServices"].ConnectionString; ProviderNameValue = System.Configuration.ConfigurationManager.ConnectionStrings["ApplicationServices"].ProviderName; } else { throw new ConfigurationErrorsException(_exNoConnectionStringFound); } } private string GetMinutesInPastToDelete() { string strReturn = "-60"; if (null != System.Configuration.ConfigurationManager.AppSettings["MinutesInPastToDeletePageState"]) { strReturn = System.Configuration.ConfigurationManager.AppSettings["MinutesInPastToDeletePageState"].ToString(); } return (strReturn); }}#endregion AppleiPhone.cs file: using System;using System.Collections.Generic;using System.Linq;using System.Web; /// <summary>/// Summary description for AppleIPhone/// </summary>public class AppleIPhone{ public AppleIPhone() { // // TODO: Add constructor logic here // } static public bool IsIPhoneOS() { return (IsIPad() || IsIPhone() || IsIPodTouch()); } static public bool IsIPhone() { return IsTest("iPhone"); } static public bool IsIPodTouch() { return IsTest("iPod"); } static public bool IsIPad() { return IsTest("iPad"); } static private bool IsTest(string Agent) { bool bl = false; string ua = HttpContext.Current.Request.UserAgent.ToLower(); try { bl = ua.Contains(Agent.ToLower()); } catch { } return (bl); }} Master page .cs: using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.HtmlControls;using System.Web.UI.WebControls; public partial class MasterPages_iPhoneMaster : System.Web.UI.MasterPage{ protected void Page_Load(object sender, EventArgs e) { HtmlHead head = Page.Header; HtmlMeta meta = new HtmlMeta(); if (AppleIPhone.IsIPad() == true) { meta.Content = "width=400,user-scalable=no"; head.Controls.Add(meta); } else { meta.Content = "width=device-width, user-scalable=no"; meta.Attributes.Add("name", "viewport"); } meta.Attributes.Add("name", "viewport"); head.Controls.Add(meta); HtmlLink cssLink = new HtmlLink(); HtmlGenericControl script = new HtmlGenericControl("script"); script.Attributes.Add("type", "text/javascript"); script.Attributes.Add("src", ResolveUrl("~/Scripts/iWebKit/javascript/functions.js")); head.Controls.Add(script); cssLink.Attributes.Add("rel", "stylesheet"); cssLink.Attributes.Add("href", ResolveUrl("~/Scripts/iWebKit/css/style.css") ); cssLink.Attributes.Add("type", "text/css"); head.Controls.Add(cssLink); HtmlGenericControl jsLink = new HtmlGenericControl("script"); //jsLink.Attributes.Add("type", "text/javascript"); //jsLink.Attributes.Add("src", ResolveUrl("~/Scripts/jquery-1.4.1.min.js") ); //head.Controls.Add(jsLink); HtmlLink appleIcon = new HtmlLink(); appleIcon.Attributes.Add("rel", "apple-touch-icon"); appleIcon.Attributes.Add("href", ResolveUrl("~/apple-touch-icon.png")); HtmlMeta appleMobileWebAppStatusBarStyle = new HtmlMeta(); appleMobileWebAppStatusBarStyle.Attributes.Add("name", "apple-mobile-web-app-status-bar-style"); appleMobileWebAppStatusBarStyle.Attributes.Add("content", "black"); head.Controls.Add(appleMobileWebAppStatusBarStyle); } internal string FindPath(string Location) { string Url = Server.MapPath(Location); return (Url); }}

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Anonymous function vs. separate named function for initialization in jquery

- by Martin N.

We just had some controversial discussion and I would like to see your opinions on the issue: Let's say we have some code that is used to initialize things when a page is loaded and it looks like this: function initStuff() { ...} ... $(document).ready(initStuff); The initStuff function is only called from the third line of the snippet. Never again. Now I would say: Usually people put this into an anonymous callback like that: $(document).ready(function() { //Body of initStuff }); because having the function in a dedicated location in the code is not really helping with readability, because with the call on ready() makes it obvious, that this code is initialization stuff. Would you agree or disagree with that decision? And why? Thank you very much for your opinion!

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